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<?php |
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/** |
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* Copyright (c) 2016-present Ganbaro Digital Ltd |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* * Neither the names of the copyright holders nor the names of his |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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* @category Libraries |
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* @package MissingBits/ListTraversals |
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* @author Stuart Herbert <[email protected]> |
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* @copyright 2016-present Ganbaro Digital Ltd www.ganbarodigital.com |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License |
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* @link http://ganbarodigital.github.io/php-the-missing-bits |
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*/ |
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namespace GanbaroDigital\MissingBits\ListTraversals; |
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use GanbaroDigital\MissingBits\TypeChecks\IsList; |
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use InvalidArgumentException; |
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/** |
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* traverse a list and traverse all of its contents |
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*/ |
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class RecursiveTraverse |
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{ |
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/** |
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* traverse a list held in an object |
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* |
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* @param object $list |
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* the list to walk |
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* @param string $listName |
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* what is the name of $list in the calling code? |
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* @param callable $callback |
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* what are we calling |
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* @return void |
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*/ |
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public static function using($list, $listName, callable $callback) |
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{ |
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// robustness! |
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if (!IsList::check($list)) { |
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throw new InvalidArgumentException($listName . ' cannot be traversed as a list'); |
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} |
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self::iterateOver($list, '', $callback); |
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} |
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/** |
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* apply a callback to every item in a list, including their children |
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* too |
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* |
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* @param mixed $item |
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* what we are iterating over |
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* @param string $path |
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* where we are in the data structure so far |
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* @param callable $callback |
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* the callback to apply |
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* @return void |
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*/ |
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private static function iterateOver($item, $path, callable $callback) |
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{ |
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// do we need to do anything with this? |
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if (!is_array($item) && !is_object($item)) { |
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// no, we do not |
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return; |
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} |
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// here we go ... |
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foreach ($item as $key => $data) { |
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$callback($data, $key, $path); |
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$newPath = $path . $key . '.'; |
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self::iterateOver($data, $newPath, $callable); |
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} |
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} |
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} |
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ganbarodigital /
php-the-missing-bits
This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.